Ventilating ducts



April 24, 1956 LAcEY 2,742,926

VENTILATING DUCTS Filed Feb. 25, 1953 INVENTOR. H. H LA C E Y ATT'Y United States Patent VENTILATIN G DUCTS Hugh H. Lacey, Indianapolis, Ind., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application February 25, 1953, Serial No. 338,704

4 Claims. (Cl. 13838) This invention relates to ventilating ducts, and more particularly to ventilating ducts for supplying swirling air to areas being ventilated.

In the use of ventilating systems, such as, for example,

air conditioning systems or systems for supplying fresh air, it is highly advantageous to mix the air thoroughly before it is supplied to an area to be ventilated. Past known apparatus for effecting this has been complicated in construction and has substantially reduced the flow of an.

An object of the invention is to provide new and im proved ventilating ducts.

Another object of the invention is to provide ventilating ducts for supplying swirling air to areas being ventilated.

Another object of the invention is to provide simple, in-

expensive air ducts for supplying swirling air to areas being ventilated.

A further object of the invention is to provide air ducts for swirling air offering minimum resistance to passage of air therethrough.

A ventilating duct illustrating certain features of the invention may include a passageway for air and bafiles, secured to the walls of passageways and extending roughly helically therealong for swirling air forced through the passageway.

A complete understanding of the invention may be ob-' tained from the following detailed description of a ventilating duct forming a specific embodiment of the invention, when read in conjunction with the appended drawings, in which:

Fig. 1 is a vertical section of a ventilating duct forming one embodiment of the invention;

Fig. 2 is a top plan view of a portion of the duct shown in Fig. 1;

Fig. 3 is a vertical section taken along line 3'-3 of Fig. 1, and I Fig. 4 is a perspective view of a portion of the duct.

Referring now in detail to the drawings, there is shown therein a duct 10 for supplying air forced therethrough to an annular outlet 11 of well known construction to a room 12 to be ventilated. The duct 10 is rectangular in cross-section, and baflies 15 and 16 are secured in staggered positions to side walls 17 and 18, respectively, of the duct. Each of the baflies 16 includes a' base strip 21 and a roughly L.-shaped deflecting portion 22 including a projection 23 positioned at the upper portion'of the duct. The baifles 15 are of identical construction with that of the baflles 16, and projections 27 of deflecting portions 25 of the baifles 15 are located at the bottom portion of the duct while base strips 26 are provided to secure the battles to the wall of the duct by screws, rivets or the like. Deflecting portions 22 and 25 of the baflles 16 and 15, respectively, project into the duct and generally in the direction in which air is forced through the duct, the deflecting portions and the side walls of the duct forming angles in the order of 60.

2,742,926 Patented Apr. 24, 1956 The baflies 15 and 16 form a pathfor the air roughly helical in shape, and direct the air in a helix so that it is ted by each bafiie being not greater than twenty-five per cent. Each deflecting portion of the baffles forms roughly a portion of a helix along the walls of the duct, and air forced along the duct by suitable means (not shown) is swirled with a minimum-obstruction to the passage thereof. i

It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangementsmay be readily devised by those skilled in the art which will embody the principles of the invention and fall Within the spirit and scope thereof.

What is claimed is:

1. A ventilating system, which comprises a duct through which air is forced in one direction, a plurality of battles each including a base and a deflecting portion extending at an oblique angle from the base, said deflecting portions having substantially a quadrant thereof removed at the end thereof most remote from the base, and means securing the bases of the baifles to opposed sides of the duct in staggered positions with the removed quadrants of successive baflles in staggered relationship such that the deflecting portions deflect the air in a helical path.

2. A ventilating system, which comprises a duct rectang'ular in cross-section through which air is forced in one direction, a plurality of baflies each including a base and an L -shaped deflecting portion extending at an oblique angle from the base, and means securing the bases of the baifles to two opposed walls of the duct in staggered positions with the L-shaped deflecting portions of successive baifles in reversed relationship such that the L- shaped deflecting portions deflect the air in a helical path.

3. A ventilating system, which comprises a duct rectangular in cross-section through which air is forced in one direction, a plurality of baflles each including a base and an L-shaped deflecting portion extending at an oblique angle of substantially from the base, and means securing the bases of the baflles to two opposed walls of the duct in staggered positions with the L-shaped deflecting portions of successive baflles in reversed relationship battles in reversed relationship such that the L-shaped deflecting portions deflect the air in a helical path, each of said deflecting portions extending across the duct not over about one quarter of the distance across the duct.

References Cited in the file of this patent UNITED STATES PATENTS 164,306 Kelshaw June 8, 1875 515,974 Schwoerer Mar. 6, 1894 1,056,373 Segelken Mar. 18, 1913 1,603,653 Ward Oct. 19, 1926 1,877,567 Erbes Sept. 13, 1932 1,937,977 Meyer Dec. 5, 1933 Brinen Aug. 30, 1949 

